<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>test1</title>
  </head>
  <style>
    .playground {
      width: 100vw;
      height: 100vh;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .container {
      width: 300px;
      height: 300px;
      border: 1px solid #ccc;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .circle1 {
      position: relative;
      background: lightblue;
      width: 100px;
      height: 100px;
      border-radius: 50%;
    }

    .circle2 {
      position: absolute;
      background: black;
      width: 80px;
      height: 80px;
      border-radius: 50%;
      left: 50%;
      top: 50%;
      transform: translate(-50%, -50%);
    }

    .trangle {
      content: "";
      position: absolute;
      width: 0;
      height: 0;
      left: 50%;
      top: 50%;
      transform: translate(-50%, -50%);
      border: 50px solid;
      border-color: transparent transparent orange;
    }
  </style>
  <body>
    <div class="playground">
      <div class="container">
        <div class="circle1">
          <div class="circle2"></div>
          <div class="trangle"></div>
        </div>
      </div>
    </div>
  </body>
</html>
